457505621 has 2 divisors, whose sum is σ = 457505622. Its totient is φ = 457505620.

The previous prime is 457505539. The next prime is 457505639. The reversal of 457505621 is 126505754.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370755025 + 86750596 = 19255^2 + 9314^2 .

It is a cyclic number.

It is not a de Polignac number, because 457505621 - 2¹⁸ = 457243477 is a prime.

It is a super-2 number, since 2×457505621² = 418622786493191282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (457501621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228752810 + 228752811.

It is an arithmetic number, because the mean of its divisors is an integer number (228752811).

Almost surely, 2^457505621 is an apocalyptic number.

It is an amenable number.

457505621 is a deficient number, since it is larger than the sum of its proper divisors (1).

457505621 is an equidigital number, since it uses as much as digits as its factorization.

457505621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 457505621 is about 21389.3810335877. The cubic root of 457505621 is about 770.5464277896.

The spelling of 457505621 in words is "four hundred fifty-seven million, five hundred five thousand, six hundred twenty-one".